Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

An acoustic anomaly with a mysterious cause.

European castle ruins in an American state park are actually the product of death and grief.

Erosion and time have created a naturally-formed water park.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

This century-old roadside attraction is full of bizarre rock formations.

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

Visit this playground of waterfalls, caves and sinkholes.

This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

In 2018, Pohoiki Road was severed by lava flowing from the eruption of Kilauea.

A model of a galactic embassy is hidden in plain sight along the highway, proposed by a UFO religion to find the aliens that created life on Earth.

This black shoreline is made up of exploded lava particles.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

This legendary urban waterfall creates a dazzling display of rainbows.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

These ancient sacred grounds granted amnesty to those who managed to reach them.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

A 1940's shrine dedicated to drowned fishermen on the outskirts of Honolulu.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.